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Javascript Data Type Q&A » math » number 

1. Javascript max() function for 3 numbers    stackoverflow.com

I need to find the highest number from 3 different numbers. The only thing I've found is max() but you can only use 2 numbers. Whats the best way?

2. Round Down Number    stackoverflow.com

How can I round down a number in Javascript? math.round() doesn't work because it rounds it to the nearest decimal. I'm not sure if there is a better way of doing it ...

3. rounding in base 10    stackoverflow.com

I have a function to round a number given to the function to the nearest whole pence.

<script type='text/javascript'>
Math.roundNumber = function(a,b){
 if(!isNaN(parseInt(a))){
     c = Math.pow(10,b);
    ...

4. Dealing with Negative Numbers in Strings    stackoverflow.com

I have a simple, but perplexing problem, with Math. The following code will take a number from a string (usually contained in a span or div) and subtract the value of 1 ...

5. Evaluating a string as a mathematical expression in javascript    stackoverflow.com

If I have a string '1+1' is there a way, other than eval(string) to get the numerical value of it i.e. I want to turn '1+1' into 2.

6. How to calculate the curve of a linear floating point number in Javascript?    stackoverflow.com

How do I calculate a curve of a linear floating point number (0 to 1) and get another floating point number as a result? What I want is up until the ...

7. JavaScript: remove insignificant trailing zeros from a number?    stackoverflow.com

Have I missed a standard API call that removes trailing insignificant zeros from a number? Ex.

var x = 1.234000 // to become 1.234;
var y = 1.234001; // stays 1.234001
Number.toFixed() and Number.toPrecision() are ...

8. Determine the optimal combination of coins for a dollar amount    stackoverflow.com

I need to find the most optimal combination of coins that makes up a certain dollar amount. So essentially, I want to use the least amount of coins to get ...

9. How to convert a number 30.006649999999994 to 30.01 in js?    stackoverflow.com

Anyone knows such a function in javascript?

10. javascript: calculate x% of a number    stackoverflow.com

I am wondering how in javascript if i was given a number (say 10000) and then was given a percentage (say 35.8%) how would I work out how much that is (eg ...

11. What are the chances that JavaScript Math.Random() will create the same number twice in a row?    stackoverflow.com

Is this correct? using - http://en.wikipedia.org/wiki/Binomial_probability Looks like values are from .0000000000000000 to .9999999999999999 Probability of happening twice = p^2 = (1/9999999999999999)^2 = 1.0 e-32 I think I am missing ...

12. JavaScript rounding numbers    stackoverflow.com

I know that I can round a number like this

var number = 1.3;
Math.round(number);
and the result I'm given is 1. But how can I round a number to the next highest whole number? ...

13. Determining Cross Over of Numbers    stackoverflow.com

Lets say I have this data set... var a = [5,6,7]; var b = [9,8,6]; Imagine that those values were plotted the y in a (x,y) coordinate pair, and the x was the array ...

14. Find the number in an array that is closest to a given number    stackoverflow.com

Good afternoon, I have an Array of integers in javascript, [5,10,15,20,25,30,35] when given a number x, how can I find the element in the array that is closest to that number? If the ...

15. How do I generate an inverse diamond from one number?    stackoverflow.com

So a friend of mine had an interesting homework assignment. Her task was to create a diamond based on user input. Sample diamond based on input of (5) is:

************
***** ...

16. Making a random number that's a multiple of 10    stackoverflow.com

I'm looking to create a random number between two ranges that is a multiple of 10. For example, if I fed the function the parameters 0, 100 it would return one of ...

17. When extending javascript functionality, what is the difference between Number and Math function?    stackoverflow.com

I have extended javascripts core functionality by creating a few functions that were useful to me. When creating test cases for a function today I started wondering which way is the ...

18. Formula for reducing higher numbers    stackoverflow.com

I honestly can't think of what to search for, but what I've tried hasn't yielded any results, so I apologize if it's been asked already. This is also more of a math ...

19. Finding the number of permutation inversions    stackoverflow.com

I was looking at this because I'm trying to make a fifteen puzzle solver. I don't really understand what it's talking about. How would I go about checking if ...

20. js generatring a random number going up in 20s    stackoverflow.com

I understand that you can create a random number via javascript with:

Math.floor(Math.random()*100);
the problem is i would like the numbers to go up in twenties, so like if it was a number ...

21. Determining the pair of natural numbers that closest approximate a square while maintaining a specific area    stackoverflow.com

So, I'm trying to draw an HTML table as close to being a square as possible from a value passed in. For example, if the number passed in is 16, then ...

22. JavaScript: Calculate the nth root of a number    stackoverflow.com

I'm trying to get the nth root of a number using JavaScript, but I don't see a way to do it using the built in Math object. Am I overlooking something?
If ...

23. Math.ceil to nearest five at position 1    stackoverflow.com

Okay.... I have a lot of uncontrolled numbers i want to round:

51255 -> 55000
25 -> 25
9214 -> 9500
13135 -> 15000
25123 -> 30000
I have tried modifying the numbers as string and counting length.... But ...

24. Using Math.exp() in Javascript with BigDecimal for large floating point numbers    stackoverflow.com

I'm attempting to perform the following calculation in Javascript:

e^x / (1 + e^x)
where x is a long floating point number. In this instance, I require accuracy to at least the 10th decimal ...

25. javascript make a numbers to be multiples of 150    stackoverflow.com

I'm trying to get numbers to be multiples of 150.

(all the num > 0)

if num = 0.333333 => output 150
if num = 149.9 => output 150
if num = 150 => output ...

26. JavaScript Number Split into indivudal digits    stackoverflow.com

Hi I am trying to solve a math problem where I take a number e.g. 45, or 111 and then split the number into separate digits e.g. 4 5 or 1 ...

27. convert number to the nearest multiple of 10    stackoverflow.com

in javascript, lets say I got a random number 136, i'd like it to convert it automatically to 140 or if I got 124 to 120 etc or 24 to 20 ...

28. percentage function with positive or negative numbers    stackoverflow.com

I couldn't find this question here although it seems simple. lets say that I want to calculate the percentage of an overall distance when i know the start and end positions ie:

function ...

29. Compare difference between multiple numbers    stackoverflow.com

The problem is that I have array with 5 numbers: 300 295 250 105 100 95 The result needed: the most numbers that have ...

30. Math.func to Number.func    devnetwork.net

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